Monolithic Power Systems Inc. MP86935-AGLJT-Z

Overview

MP86935-AGLJT-Z from Monolithic Power Systems is a monolithic half-bridge Intelli-Phase™ power stage integrating high-side and low-side MOSFETs, gate drivers, current sensing, and temperature sensing in a single TLGA-35 (3mm×6mm) package. It delivers 60A continuous output current, operates from 3V–12V input, supports 100kHz–3MHz switching, and features tri-state PWM control for multi-phase buck regulators in server core voltage rails.

For engineers reviewing the MP86935-AGLJT-Z datasheet, MP86935-AGLJT-Z pinout, MP86935-AGLJT-Z application, or MP86935-AGLJT-Z equivalent, key selection criteria include its integrated Accu-Sense™ current monitoring (±2% gain accuracy), VTEMP/FLT dual-mode junction temperature reporting (10mV/°C) and fault flagging, dead-time control (2ns rising / 8ns falling), and thermal resistance θJB = 2.2°C/W for high-density server VRMs.

Technical Context

The MP86935-AGLJT-Z implements a fully integrated half-bridge topology with internal HS-FET and LS-FET optimized for synchronous buck conversion. Its driver architecture supports tri-state PWM inputs to enable diode emulation and standby modes, with zero-current detection (ZCD) enabling lossless low-side conduction during light-load conditions.

It integrates analog functions including bidirectional current sensing (8μA/A gain, ±2μA offset), junction temperature sensing (−100mV offset at 25°C), and fault reporting via VTEMP/FLT pin pull-up to VDD on over-current, over-temperature (>160°C), or SW-to-PGND short events - all latched until VIN/VDD power cycle.

Key Specifications

Pinout & Package

MP86935-AGLJT-Z uses a TLGA-35 (3mm × 6mm) thermally enhanced land-grid array package with exposed PGND pads on bottom for optimal thermal and electrical performance. The package supports reflow soldering per JEDEC MO-303 and includes 35 terminals arranged in a 5×7 grid with Pin 1 index marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current integrated power stage applications.

Compared with MP86935-AGLJT-Z, MP86933 offers cost reduction at lower current, while ISL99390 trades integrated sensing for broader controller compatibility - neither matches the combined Accu-Sense™ accuracy, dual-mode VTEMP/FLT, and 2.2°C/W thermal performance in the same footprint.

Availability

MP86935-AGLJT-Z is available at Aetrix Electronics and suitable for server core voltage regulation, GPU power delivery, AI accelerator modules, and high-density power modules requiring stable component supply, full MSL3 tape-and-reel packaging (5000/reel), and guaranteed long-term lifecycle support.

Supply support for MP86935-AGLJT-Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with over two decades of expertise in DC/DC conversion, motor drivers, and power modules.

The MP86935-A belongs to MPS's Intelli-Phase™ family - designed specifically for high-efficiency, high-current, multi-phase buck converters in datacenter and AI hardware where integration, thermal performance, and real-time current/temperature visibility are critical.

FAQ

What is the purpose of the tri-state PWM input on MP86935-AGLJT-Z?

The tri-state PWM input enables three operational modes: high = normal switching, low = forced diode emulation, and floating/mid-voltage = standby. This eliminates the need for external logic or mode-select pins, allowing the controller to dynamically optimize efficiency across load ranges without adding complexity to the signal path.

How does the VTEMP/FLT pin function during normal operation versus fault conditions?

During normal operation, VTEMP/FLT outputs a voltage proportional to junction temperature (10mV/°C, −100mV offset at 25°C). During any fault (over-current, over-temperature >160°C, or SW-to-PGND short), it pulls up to VDD within 200ns to signal the event - and remains latched until VIN or VDD is power-cycled.

Can MP86935-AGLJT-Z be used in single-phase applications, or is it limited to multi-phase?

MP86935-AGLJT-Z is fully functional in single-phase buck converters and commonly used in GPU core rails and AI accelerator modules. Its multi-phase readiness comes from features like VTEMP/FLT sharing and synchronized PWM timing - not a requirement for operation - making it equally valid for single- or multi-phase topologies.

What is the recommended bootstrap capacitor value and placement for MP86935-AGLJT-Z?

A 0.1µF to 1µF ceramic capacitor is required between BST and SW pins. It must be placed directly adjacent to the device with minimal trace length and width ≥20 mils; vias in the BST path are discouraged to avoid inductance that could cause gate drive instability or shoot-through.

Does MP86935-AGLJT-Z require external current-sense resistors?

No. MP86935-AGLJT-Z includes integrated Accu-Sense™ current sensing with 8μA/A gain and ±2μA offset. An external resistor (RCS) may be added from CS to a reference voltage to scale the output voltage, but no shunt resistor is needed - eliminating associated power loss and layout sensitivity.

What PCB layout practices are essential to achieve rated 60A performance?

Key practices include: placing input MLCCs directly adjacent to VIN/PGND pins; using ≥8 vias per VIN/PGND pad; routing BST/VDRV/VDD caps with ≥20-mil traces; connecting AGND and PGND only at the VDD capacitor; and isolating the CS trace from SW/PWM nodes to prevent noise coupling into current measurement.

Is MP86935-AGLJT-Z RoHS-compliant and halogen-free?

Yes. MP86935-AGLJT-Z is lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS maintains green status certification, and material declarations are publicly available on the Monolithic Power Systems website under Quality Assurance resources.